From the inbox:
Zookoda is a web-based email marketing application designed specifically for blog publishers. Zookoda’s core function is to drive traffic back to the blog owners site, by providing summary (“teaser”) content in an email newsletter. Zookoda is all about providing the blog owner with a marketing / promotion solution aimed at building community / loyalty and driving traffic back to the site. Zookoda is an on-ramp for blog owners – we drive traffic and exposure back to the blog.
From the features list it looks good: controls bounces, schedule recurring broadcasts, double opt-in and it supports multiple blogs. Take it for a spin!